Polyether polymer composition

ABSTRACT

A polyether polymer composition containing 50 parts by weight or more of a filler per 100 parts by weight of a polyether polymer composed of 10 to 200 oxirane monomer units is provided. The present invention can provide a polyether polymer composition that is capable of appropriately showing various properties of the filler such as high heat conductivity and high electrical conductivity and that also has excellent long-term stability.

TECHNICAL FIELD

The present invention relates to a polyether polymer composition that iscapable of appropriately showing various properties of a filler such ashigh heat conductivity and high electrical conductivity and that alsohas excellent long-term stability.

BACKGROUND ART

With a reduction in size and an increase in output power of aheat-generating electronic component such as a semiconductor device, anamount of heat per unit area generated from the electronic component hasbeen becoming extremely large. In contrast, the heat-generatingelectronic component such as a semiconductor device needs to be cooledbecause its temperature increase causes a performance deterioration. Theheat-generating electronic component is cooled by, for example,providing a cooling member such as a heat sink made of metal in avicinity of such a heat-generating electronic component. However, therehas been a problem in that a bad contact between the heat-generatingelectronic component and the cooling member such as a heat sink allowsair to intervene in a contact portion and causes a decrease in coolingefficiency. To solve this problem, a method to bring them in contactwith each other through a heat conductive material has beenconventionally employed to efficiently transfer heat from theheat-generating electronic component to the cooling member such as aheat sink. When the heat conductive polymer material is used, the heatconductive polymer material intervenes at a surface boundary of thecontact portion instead of the air, which allows an efficient heattransfer and consequently improves cooling efficiency.

As such a heat conductive polymer material, besides a heat conductivesheet composed of a hardened material produced by filling a siliconerubber and the like with a heat conductive filler, a heat conductiveadhesive, which has flexibility and can be hardened by cross-linking,produced by filling a silicone compound having liquidity with a heatconductive filler, and also a heat conductive grease having liquidityproduced by filling a liquid material such as liquid silicone with aheat conductive filler are used, for example (see Patent Document 1, forexample). All these materials are produced by filling a rubber materialor a liquid material as a matrix with a heat conductive filler.

In the meanwhile, as a semiconductor used for a highly integratedmachine such as a supercomputer and a server recently has more and morefunctions, an amount of heat generated during an operation has beenbecoming larger and larger. For that reason, the heat conductive sheetand the heat conductive grease used for the semiconductor are expectedto have better heat dissipating performance. As a method for improvingthe heat dissipating performance of the heat conductive sheet and theheat conductive grease, a method for improving their heat conductivityhas been commonly used. However, there has been a problem in that when apolymer is filled with a large amount of the heat conductive filler toimprove the heat conductivity, the heat conductive filler in the heatconductive sheet or the heat conductive grease shows poor dispersibilityin some cases, and also, even when the heat conductive filler shows gooddispersibility at the beginning of use, the heat conductive filler isagglomerated after long-term use and thus fails to show sufficientheat-transfer performance.

Besides the above, there has been a demand for a fine and flexibleelectrical wiring and electrical circuit in the field of electronicmaterials, and therefore a technique for printing an electrical circuitusing an ink-jet printing system or the like has been studied to meetsuch a demand for fine and flexible products. Especially, if anelectrically conductive paste or an electrically conductive ink can beprinted on a surface of a target material using the ink-jet printingsystem or the like, a continuous printing of very fine wires for formingfine patterns becomes possible. With such a method that forms finepatterns, a production cost can be reduced significantly as compared tothat of a conventional method that requires a material to undergo anetching process and a photolithography process.

As the electrically conductive paste and the electrically conductive inkwhich are expected to be used in the ink-jet printing system, acomposition containing a polymer such as an epoxy resin and anelectrically conductive filler such as a silver powder is generally used(see Patent Document 2, for example). Further, a form of the electricalcircuit is fixed by thermally hardening an epoxy moiety after printingor when metal particles are melted at a time of thermally hardening, thecomposition is self-organized to form a metal joint portion and athermosetting resin serves to strengthen around that portion in somecases.

Such an electrically conductive paste and an electrically conductive inkare expected to achieve high electrical conductivity even if their usein the ink-jet printing system or the like leads to a further advance intechnology to produce more fine patterns. However, there has been thefollowing problem: when a polymer is filled with a large amount of theelectrically conductive filler to improve electrical conductivity, theelectrically conductive filler in the electrically conductive paste orthe electrically conductive ink shows poor dispersibility in some cases,and also, even when the electrically conductive filler shows gooddispersibility at the beginning of use, the electrically conductivefiller is agglomerated after log-term use and thus fails to showsufficient electrical conductive performance.

RELATED ART Patent Documents

Patent Document 1: Japanese Patent No. 5434795 Patent Document 2:Japanese Patent No. 5839573

SUMMARY OF THE INVENT ION Problem to be Solved by the Invention

The present invention was completed in view of such a situation. Anobject of the present invention is to provide a polyether polymercomposition that is capable of appropriately showing various propertiesof a filler such as high heat conductivity and high electricalconductivity and that also has excellent long-term stability, and toprovide a grease and a paste composed of such a polyether polymercomposition.

Means for Solving the Problem

The present inventors made an extensive study to achieve the aboveobject. The present inventors consequently found out that a compositionproduced by compounding a certain amount of a filler in a polyetherpolymer composed of a certain amount of oxirane monomer units is capableof appropriately showing various properties of the filler such as highheat conductivity and high electrical conductivity, and further, thecomposition is capable of effectively preventing agglomeration of thefiller even after a lapse of long time and has excellent long-termstability. The present invention was completed based on the abovefindings.

That is, the present invention provides a polyether polymer compositioncontaining 50 parts by weight or more of a filler per 100 parts byweight of a polyether polymer composed of 10 to 200 oxirane monomerunits.

In the polyether polymer composition of the present invention, thefiller is preferably a metal-containing powder, more preferably at leastone selected from a metal powder, a metal oxide powder, and a metalnitride powder.

In the polyether polymer composition of the present invention, at leasta part of the oxirane monomer unit included in the polyether polymer ispreferably an oxirane monomer unit having a cationic group, and morepreferably, the polyether polymer is composed of a monomer unitrepresented by the following general formula (1):

In the above general formula (1), A⁺ represents a cationic group or acationic group-containing group, X⁻ represents any counter anion, Rrepresents a non-ionic group, n is an integer of 1 or more, m is aninteger of 0 or more, and n+m satisfies 10≤n+m≤200.

In the polyether polymer composition of the present invention, thecationic group preferably contains a heterocyclic ring having a cationicnitrogen atom.

In the polyether polymer composition of the present invention, anaverage particle size of the filler is 0.01 μm or more and less than 50μm.

The polyether polymer composition of the present invention is preferablya heat dissipating polymer composition.

Alternatively, the polyether polymer composition of the presentinvention is preferably an electrically conductive polymer composition.

Further, the polyether polymer composition of the present invention ispreferably a grease form or a paste form.

Effects of Invention

The present invention can provide the polyether polymer composition thatis capable of appropriately showing various properties of a filler suchas high heat conductivity and high electrical conductivity and that alsohas excellent long-term stability.

DESCRIPTION OF EMBODIMENTS

A polyether polymer composition of the present invention contains 50parts by weight or more of a filler per 100 parts by weight of apolyether polymer composed of 10 to 200 oxirane monomer units.

<Polyether Polymer>

A polyether polymer composing the polyether polymer composition of thepresent invention is a polymer composed of an oxirane monomer unit whichis obtained by ring-opening polymerization of an oxirane structure partof a compound containing an oxirane structure, and the number of oxiranemonomer units is 10 to 200.

Specific examples of the oxirane monomer unit include an alkylene oxideunit such as an ethylene oxide unit, a propylene oxide unit, and1,2-butylene oxide unit; an epihalohydrin unit such as anepichlorohydrin unit, an epibromohydrin unit, and an epiiodohydrin unit;an alkenyl group-containing oxirane monomer unit such as an allylglycidyl ether unit; an aromatic ether group-containing oxirane monomerunit such as a phenyl glycidyl ether unit; a (meth)acryloylgroup-containing oxirane monomer unit such as a glycidyl acrylate unitand a glycidyl methacrylate unit; and the like. However, the oxiranemonomer unit is not limited to these examples.

The polyether polymer used in the present invention may have two or moreoxirane monomer units. Although a distribution pattern of thoserepeating units is not limited to a particular pattern in this case, arandom distribution is preferred.

Further, the polyether polymer used in the present invention may be acationic group-containing polyether polymer containing oxirane monomerunits in which at least a part of the oxirane monomer units has acationic group. Including the oxirane monomer units having a cationicgroup can appropriately prevent agglomeration of the filler after alapse of long time, which thus allows the polyether polymer compositionof the present invention to have excellent long-term stability.

The cationic group which can be included in the polyether polymer is notlimited to a particular cationic group. However, from a viewpoint of thecationic group which is capable of appropriately enhancing an effect ofimproving dispersibility of the filler in the polyether polymercomposition and an effect of preventing the agglomeration of the fillerafter a lapse of long time, the cationic group is preferably a cationicgroup in which atoms from group 15 or 16 of the periodic table havefamed an onium cation structure, more preferably a cationic group inwhich nitrogen atoms have famed an onium cation structure, furtherpreferably a cationic group in which nitrogen atoms in a nitrogenatom-containing aromatic heterocycle have famed an onium cationstructure, particularly preferably a cationic group in which nitrogenatoms in an imidazolium ring have famed an onium cation structure.

Specific examples of the cationic group include an ammonium group suchas an ammonium group, a methylammonium group, a butylammonium group, acyclohexyl ammonium group, an anilinium group, a benzylammonium group,an ethanolammonium group, a dimethylammonium group, a diethylammoniumgroup, a dibutylammonium group, a nonylphenylammonium group, atrimethylammonium group, a triethylammonium group, an-butyldimethylammonium group, a n-octyldimethylammonium group, an-stearyldimethylammonium group, a tributylammonium group, atrivinylammonium group, a triethanolammonium group, anN,N-dimethylethanolammonium group, and a tri(2-ethoxyethyl)ammoniumgroup; a group containing a heterocyclic ring having a cationic nitrogenatom such as a piperidinium group, a 1-pyrrolidinium group, animidazolium group, a 1-methylimidazolium group, a 1-ethylimidazoliumgroup, a benzimidazolium group, a pyrrolium group, a 1-methylpyrroliumgroup, an oxazolium group, a benzoxazolium group, a benzisoxazoliumgroup, a pyrazolium group, an isoxazolium group, a pyridinium group, a2,6-dimethylpyridinium group, a pyrazinium group, a pyrimidinium group,a pyridazinium group, a triazinium group, an N,N-dimethylaniliniumgroup, a quinolinium group, an isoquinolinium group, an indoliniumgroup, an isoindolium group, a quinoxalium group, an isoquinoxaliumgroup, and a thiazolium group; a group having a cationic phosphorus atomsuch as a triphenylphosphonium salt and a tributylphosphonium group; andthe like. However, it is not limited to these examples. Among theseexamples, a group containing a heterocyclic ring having a cationicnitrogen atom such as an imidazolium group, a 1-methylimidazolium group,a 1-ethylimidazolium group, and a benzimidazolium group is preferred.

Although the cationic group generally has a counter anion, the counteranion is not limited to a particular one and examples thereof include ahalide ion such as Cl⁻, Br⁻, and I⁻, a sulfonylimide ion such as(FSO₂)₂N⁻, (CF₃SO₂)₂N⁻, and (CF₃CF₂SO₂)₂N⁻, and further, OH⁻, SCN⁻, BF₄⁻, PF₆ ⁻, ClO₄ ⁻, CH₃SO₃ ⁻, CF₃SO₃ ⁻, CF₃COO⁻, PhCOO⁻, and the like.These counter anions may be appropriately selected according toproperties of a polyether polymer composition to be produced.

When the polyether polymer used in the present invention is a cationicgroup-containing polyether polymer, among oxirane monomer unitscomposing the polyether polymer, at least a part of the oxirane monomerunits may be an oxirane monomer unit having a cationic group and, forexample, the oxirane monomer units composing the polyether polymer mayall have a cationic group or may be a mix of the oxirane monomer unitshaving a cationic group and the oxirane monomer units not having acationic group. When the polyether polymer used in the present inventionis a cationic group-containing polyether polymer, a proportion ofoxirane monomer units having a cationic group is not limited to aparticular proportion. However, it is preferably 5 mol % or more, morepreferably 20 mol % or more, based on all oxirane monomer units of thepolyether polymer. An upper limit of the proportion of the oxiranemonomer units having a cationic group is not limited to a particularvalue.

When the polyether polymer used in the present invention is a cationicgroup-containing polyether polymer, a structure of the cationicgroup-containing polyether polymer is not particularly limited to aparticular structure. However, a structure composed of a monomer unitrepresented by the following general formula (1) is preferred.

In the above general formula (1), A⁺ represents a cationic group or acationic group-containing group, X⁻ represents any counter anion, Rrepresents a non-ionic group, n is an integer of 1 or more, m is aninteger of 0 or more, and n+m satisfies 10≤n+m≤200.

In the above general formula (1), A⁺ represents a cationic group or acationic group-containing group. Specific examples of the cationic groupare as described above, and specific examples of the cationicgroup-containing group include a group containing the cationic group asdescribed above.

In the above general formula (1), X⁻ represents any counter anion.Specific examples of the counter anion are as described above.

In the above general formula (1), R represents a non-ionic group and isnot limited to a particular group as long as it is a non-ionic group.Examples thereof include a hydrogen atom; an alkyl group having 1 to 10carbon atoms such as a methyl group, an ethyl group, a n-propyl group,an isopropyl group, a n-butyl group, an isobutyl group, and a t-butylgroup; an alkenyl group having 2 to 10 carbon atoms such as a vinylgroup, an allyl group, and a propenyl group; an alkynyl group having 2to 10 carbon atoms such as an ethynyl group and a propynyl group; acycloalkyl group having 3 to 20 carbon atoms such as a cyclopropylgroup, a cyclobutyl group, a cyclopentyl group, and a cyclohexyl group;an aryl group having 6 to 20 carbon atoms such as a phenyl group, a1-naphthyl group, and a 2-naphthyl group; and the like.

Among these examples, an alkyl group having 1 to 10 carbon atoms, analkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to10 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, and anaryl group having 6 to 20 carbon atoms may have a substituent at anyposition.

Examples of the substituent include an alkyl group having 1 to 6 carbonatoms such as a methyl group and an ethyl group; an alkoxy group having1 to 6 carbon atoms such as a methoxy group, an ethoxy group, and anisopropoxy group; an alkenyloxy group having 2 to 6 carbon atoms such asa vinyloxy group and an allyloxy group; an aryl group which may have asubstituent such as a phenyl group, a 4-methylphenyl group, a2-chlorophenyl group, and a 3-methoxyphenyl group; a halogen atom suchas a fluorine atom, a chlorine atom, and a bromine atom; analkylcarbonyl group having 1 to 6 carbon atoms such as a methylcarbonylgroup and an ethylcarbonyl group; a (meth)acryloyloxy group such as anacryloyloxy group and a methacryloyloxy group; and the like.

In the above general formula (1), n may be an integer of 1 or more, mmay be an integer of 0 or more, and n+m satisfies 10 n+m 200. However, nis preferably an integer of 10 to 200, more preferably an integer of 20to 190, and m is preferably an integer of 0 to 199, more preferably aninteger of 0 to 190, further preferably an integer of 0 to 100,particularly preferably m=0. Further, n+m is an integer of 10 to 200,preferably an integer of 15 to 195, more preferably an integer of 20 to190.

When a structure of the cationic group-containing polyether polymer iscomposed of a monomer unit represented by the above general formula (1),a polymer chain end is not limited to a particular group and may be anygroup. Examples of the polymer chain end include the above-describedcationic groups, a hydroxy group, a hydrogen atom, and the like.

When the polyether polymer used in the present invention is a cationicgroup-containing polyether polymer, it may include two or more oxiranemonomer units, and a distribution pattern of those repeating units isnot limited to a particular pattern in this case and a randomdistribution is preferred. For example, the polyether polymer mayinclude an oxirane monomer unit having two or more cationic groups, oralternatively, may include an oxirane monomer unit having one or two ormore cationic groups and an oxirane monomer unit not having one or twoor more cationic groups.

The polyether polymer used in the present invention is composed of 10 to200 oxirane monomer units, preferably 15 to 195 oxirane monomer units,more preferably 20 to 190 oxirane monomer units. When the number ofoxirane monomer units composing the polyether polymer is too large, acomposition to be produced has no liquidity and thus is not capable ofbeing produced as a grease form or a paste form. Therefore, thecomposition cannot be used for an application where the composition in agrease form or a paste form is used. In contrast, when the number ofoxirane monomer units composing the polyether polymer is too small, thefiller in a composition to be produced shows poor dispersibility, andfurther, the filler is agglomerated after a lapse of long time, whichthus results in poor long-term stability. The number of oxirane monomerunits of the polyether polymer is determined by a method described inEXAMPLES below.

Further, a number average molecular weight (Mn) of the polyether polymerused in the present invention is not limited to a particular value aslong as the polyether polymer is composed of 10 to 200 oxirane monomerunits. However, the number average molecular weight is preferably 300 to150,000, more preferably 400 to 100,000, particularly preferably 500 to80,000. A molecular weight distribution (Mw/Mn) is preferably 1.0 to2.0, more preferably 1.0 to 1.5. The number average molecular weight andthe molecular weight distribution of the polyether polymer can bedetermined by a method described in EXAMPLES below.

A chain structure of the polyether polymer used in the present inventionis not limited to a particular structure and may be a straight chain ora chain structure having a branch such as a graft chain and a radialchain.

Although a method for synthesizing the polyether polymer used in thepresent invention is not limited to a particular method, any method forsynthesizing that can produce a target polyether polymer can beemployed. Examples of the method include a method for producing apolyether polymer, which is disclosed in the Japanese Patent Laid-OpenNo. 2010-53217, by ring-opening polymerization of a monomer containingan oxirane monomer in the presence of a catalyst composed of an oniumsalt which is a compound having an atom from group 15 or 16 of theperiodic table and trialkylaluminum in which alkyl groups contained areall straight-chained alkyl group, and the like.

When the polyether polymer used in the present invention is a cationicgroup-containing polyether polymer, examples of a method forsynthesizing the cationic group-containing polyether polymer include thefollowing method: In the above method, at least epihalohydrin such asepichlorohydrin, epibromohydrin, and epiiodohydrin is used as a monomerto produce a polyether polymer not having a cationic group. The producedpolyether polymer not having a cationic group is subjected to a reactionwith an amine compound such as an imidazole compound to convert ahalogen group composing the epihalohydrin monomer unit of the polyetherpolymer into an onium halide group. A halide ion composing the oniumhalide group is further subjected to an anion-exchange reaction, asnecessary, to produce a cationic group-containing polyether polymer.

<Filler>

The polyether polymer composition of the present invention contains theabove-described polyether polymer and a filler.

The filler used in the present invention is not limited to a particularfiller in terms of its chemical structure, composition, shape, and size.However, the chemical structure of the filler may be any of an organicfiller and an inorganic filler, and it is preferred that the inorganicfiller is used.

The inorganic filler is not limited to a particular filler and examplesthereof include a metal-containing powder, a carbon material, aninorganic material other than the metal-containing powder and the carbonmaterial, and the like. Among these examples, the metal-containingpowder is preferably used from the viewpoint that the polyether polymercomposition of the present invention can be provided with high heatconductivity or high electrical conductivity.

Examples of the metal-containing powder used in the present inventionmay include a powder of a single metal or an alloy or a compound havinga metal atom. However, a metal powder (a powder of a single metal or analloy powder), a metal oxide powder, and a metal nitride powder arepreferably used.

Examples of the metal powder include an aluminum powder, a gold powder,a silver powder, a copper powder, a nickel powder, an indium powder, agallium powder, a metal silicon powder, and the like. Among theseexamples, the silver powder and the copper powder are preferably used.

Examples of the metal oxide powder include a zinc oxide powder, a silicapowder, a titanium oxide powder, an alumina powder, a silver oxidepowder, a zirconium oxide powder, a magnesium oxide powder, and thelike. Among these examples, the zinc oxide powder is preferably used.

Examples of the metal nitride powder include a boron nitride powder, analuminum nitride powder, and the like. Among these examples, the boronnitride powder is preferably used.

In the present invention, depending on properties of a polyether polymercomposition to be produced, the metal-containing powder may beappropriately selected from the above examples, and these examples maybe used singly or in combinations of two or more.

For example, when the polyether polymer composition of the presentinvention is used for an application that requires heat conductivity, apolyether polymer composition containing a metal oxide powder and ametal nitride powder as a metal-containing powder preferably in a totalproportion of 10 to 2000 parts by weight, more preferably in a totalproportion of 100 to 1750 parts by weight, further preferably in a totalproportion of 200 to 1500 parts by weight, or a metal powder preferablyin a proportion of 0 to 1990 parts by weight, more preferably in aproportion of 10 to 1500 parts by weight, further preferably in aproportion of 50 to 1000 parts by weight, per 100 parts by weight of thepolyether polymer, is used. Including the metal oxide powder and themetal nitride powder, or the metal powder in a proportion of the aboverange allows the polyether polymer composition of the present inventionto have particularly excellent heat conductivity.

When the polyether polymer composition of the present invention is usedfor an application that requires electrical conductivity, a polyetherpolymer composition containing a metal powder as a metal-containingpowder preferably in a proportion of 50 to 2000 parts by weight, morepreferably in a proportion of 100 to 1750 parts by weight, furtherpreferably in a proportion of 200 to 1500 parts by weight, per 100 partsby weight of the polyether polymer, is used. Although the metal oxidepowder and the metal nitride powder may be contained in the polyetherpolymer composition of the present invention, it is preferred that thesepowders are not substantially contained. Including the metal powder in aproportion of the above range allows the polyether polymer compositionof the present invention to have particularly excellent electricalconductivity.

The carbon material is not limited to a particular material and examplesthereof include carbon black, acetylene black, carbon fiber, graphite,and the like.

Examples of the inorganic material other than the metal-containingpowder and the carbon material include a glass fiber, a glass powder,calcium carbonate, talc, clay, and the like.

When the carbon material and the inorganic material other than themetal-containing powder and the carbon material are used as a filler,these materials may be used alone or in combination with theabove-described metal-containing powder. When the carbon material andthe inorganic material other than the metal-containing powder and thecarbon material are used in combination with the metal-containingpowder, a content rate of the metal-containing powder in the filler ispreferably 50 to 2000 parts by weight, more preferably 100 to 1750 partsby weight, further preferably 200 to 1500 parts by weight, per 100 partsby weight of the polyether polymer.

A shape of the filler used in the present invention is not limited to aparticular shape and may be an indefinite shape besides a scale-likeshape, a teardrop-like shape, a spherical shape, a needle shape, afibrous shape, and an irregular shape. Additionally, a filler that hasbeen surface treated beforehand may be used.

When the filler used in the present invention is a scale-like shape, ateardrop-like shape, a spherical shape, a needle shape, or the like, itssize is not limited to a particular size. However, an average particlesize is preferably 0.01 μm or more and less than 50 μm, more preferably0.02 μm or more and less than 40 μm. When the average particle size istoo large, smoothness of the polyether polymer composition of thepresent invention is lessened in some cases, and this results in anincrease in contact resistance (heat resistance, electrical resistance)in some cases. When the average particle size is too small, on the otherhand, contact points between fillers in the polyether polymercomposition are lessened, and properties of the filler such as heatconductivity and electrical conductivity may not be shown sufficiently.

A content of the filler in the polyether polymer composition of thepresent invention is 50 parts by weight or more, preferably 100 parts byweight or more, more preferably 200 parts by weight or more, furtherpreferably 400 parts by weight or more, particularly preferably 500parts by weight or more, per 100 parts by weight of the polyetherpolymer. Although an upper limit of the content is not limited to aparticular value, it is usually 2000 parts by weight or less. Accordingto the polyether polymer composition of the present invention, even whena relatively large amount of the filler as described above is included,the filler can be dispersed well in the polyether polymer and this cansuitably ensure the contact points between the fillers. For that reason,various properties of the filler such as high heat conductivity and highelectrical conductivity can be appropriately shown. Additionally,according to the polyether polymer composition of the present invention,even when a relatively large amount of the filler as described above isincluded, the agglomeration of the filler can be effectively preventedeven after a lapse of long time, and excellent long-term stability isprovided.

In order to appropriately show properties of the filler such as highheat conductivity and high electrical conductivity in a conventionalmanner in particular, even when a relatively large amount of the filleras described above was included in various polymers, it was generallydifficult for the filler to be dispersed well in a polymer. For thatreason, in practical situations, properties of the filler such as highheat conductivity and high electrical conductivity could not be shownsufficiently in some cases, or even producing a composition in a greaseform or a paste form was difficult in the first place. Further, even ifit was possible to disperse the filler well, the filler was agglomeratedafter long-term use and as a result, the properties of the filler suchas high heat conductivity and high electrical conductivity could not beshown sufficiently. In contrast to the above, the present inventioneffectively solves the above problems by using the above-describedparticular polyether polymer as a matrix polymer.

<Method for Producing Polyether Polymer Composition>

The polyether polymer composition of the present invention can beproduced by mixing the above-described polyether polymer and theabove-described filler. A method for mixing the polyether polymer andthe filler is not limited to a particular method. However, a publiclyknown mixing method such as a mixing method with a shear force beingapplied by a mill, an automatic mortar, or a kneader, and a mixingmethod using ultrasonic waves can be employed.

Mixing of the polyether polymer and the filler may be performed in asolvent. The solvent used when performing the mixing in the solvent isnot limited to a particular solvent. However, a polar solvent ispreferably used in terms of the fact that the polar solvent allows thefiller to be dispersed better in the polyether polymer. Examples of thepolar solvent include ether such as tetrahydrofuran and anisole; estersuch as ethyl acetate and ethyl benzoate; ketone such as acetone,2-butanone, and acetophenone; an aprotic polar solvent such asacetonitrile, dimethylformamide, dimethylacetamide, dimethylsulfoxide,and methylpyrrolidone; a protic polar solvent such as ethanol, methanol,and water; and the like. These solvents may be used singly or can beused as a mixed solvent of two or more. An amount used of the solvent isnot limited to a particular amount. However, the amount of the solventmay be set so that a total content rate of the polyether polymer and thefiller in the solvent is in a range from 0.1 to 80% by weight.

A method for mixing the polyether polymer and the filler in the solventis not limited to a particular method. However, a method for mixing byadding a polyether polymer in a suspension prepared by suspending afiller in a solvent may be employed, or a method for mixing by adding afiller in a solution prepared by dissolving a polyether polymer in asolvent may be employed. Mixing may be performed by stirring with acommonly used stirrer or may be performed with an ultrasonic disperser.Although a solution produced by mixing can be used directly as thepolyether polymer composition of the present invention, a solution aftera solvent is removed is preferably used. A method for removing a solventis not limited to a particular method. For example, the solvent may beremoved by evaporation or may be solidified by drying.

When mixing the polyether polymer and the filler without using asolvent, a method for mixing by adding a polyether polymer to a fillermay be employed or a method for mixing by adding a filler to a polyetherpolymer may be employed, for example. In this case, mixing may beperformed with a commonly used kneader or stirrer, or may be performedwith a mill or an automatic mortar.

<Other Components>

The polyether polymer composition of the present invention may containother components in addition to the polyether polymer and the filler.The other components are not limited to a particular component andexamples thereof include a polymer material other than theabove-described particular polyether polymer; an organic solvent; anionic liquid; and the like. When a polyether polymer has across-linkable monomer unit, a cross-linker may be included therein toproduce a cross-linkable composition, and in this case, a cross-linkingaid or a cross-linking promoter may be included as necessary. Inparticular, the polyether polymer composition of the present inventionproduced as a cross-linkable composition in a grease form or a pasteform is applied, coated, printed, or the like on a base material or thelike, which is then subjected to cross-linking to produce a cross-linkedproduct, and thereby it is possible to appropriately maintain theeffects of the present invention, specifically the following effects:various properties of a filler such as high heat conductivity and highelectrical conductivity can be appropriately shown and also excellentlong-term stability can be provided; and at the same time, mechanicalstrength as a structural material can be improved. The cross-linker maybe selected according to a structure of a cross-linkable monomer unit tobe used and the like, and is not limited to a particular cross-linker.

The polymer material other than the above-described particular polyetherpolymer is not limited to a particular material and examples thereofinclude a rubber material such as an acrylonitrile-butadiene rubber, astyrene-butadiene rubber, a butadiene rubber, an isoprene rubber, anacrylic rubber, an ethylene-propylene rubber, a urethane rubber, afluororubber, and a silicon rubber; a thermoplastic elastomer materialsuch as styrene-isoprene-styrene, styrene-butadiene-styrene, andstyrene-ethylene-butadiene-styrene; a resin material such as PMMA,polyethylene, polypropylene, polystyrene, polycarbonate, ABS, vinylchloride, and PET; a photo-curable or thermosetting resin such as anepoxy resin, a urethane resin, and a thermosetting or photo-curableacrylate resin; and the like.

According to the above, the polyether polymer composition of the presentinvention contains 50 parts by weight or more of the filler per 100parts by weight of the above-described particular polyether polymer.According to the polyether polymer composition of the present invention,as the filler can be dispersed well in the polyether polymer, variousproperties of the filler such as high heat conductivity and highelectrical conductivity can be appropriately shown, and further, theagglomeration of the filler can be effectively prevented even after alapse of long time and excellent long-term stability is provided. Inparticular, the polyether polymer composition of the present inventionis capable of being famed into a grease form or a paste form, whichtherefore can be suitably used as various greases and pastes such as aheat dissipating grease having high heat conductivity and excellentlong-term stability and an electrically conductive paste having highelectrical conductivity and excellent long-term stability.

EXAMPLES

Hereinafter, the present invention will be described with reference tomore detailed examples. However, the present invention is not limited tothese examples. Note that the term “part(s)” mentioned below is based onweight unless otherwise noted. Further, tests and evaluations wereconducted in accordance with the description below.

(1) Number of Repeating Units, Number Average Molecular Weight (Mn), andMolecular Weight Distribution (Mw/Mn) of Polyether Polymer

Regarding a number average molecular weight (Mn) and a molecular weightdistribution (Mw/Mn) of a polyether polymer not having a cationic group,gel permeation chromatography (GPC) with tetrahydrofuran as a solventwas used to measure the number average molecular weight (Mn) and themolecular weight distribution (Mw/Mn) of the polyether polymer which arecalculated as a polystyrene equivalent value. HLC-8320 (manufactured byTosoh Corporation) was used as a measuring instrument in which twocolumns of TSKgela-M (manufactured by Tosoh Corporation) were connectedin series and the differential refractometer RI-8320 (manufactured byTosoh Corporation) was used as a detector. The resultant number averagemolecular weight was divided by a molecular weight of repeating unitscomposing the polyether polymer to calculate the number of the repeatingunits.

A number average molecular weight of the cationic group-containingpolyether polymer is determined as follows. That is, first of all, anaverage molecular weight of all repeating units composing the polyetherpolymer having a cationic group is determined from an average molecularweight of repeating units of the polyether polymer not having a cationicgroup in which the cationic group has not yet been introduced, anaverage molecular weight of oxirane monomer units having a cationicgroup, and a content rate of the oxirane monomer units having a cationicgroup determined by (2) below. Then, the number of repeating units ofthe polyether polymer not having a cationic group in which a cationicgroup has not yet been introduced was multiplied by the averagemolecular weight of the all repeating units composing the cationicgroup-containing polyether polymer, and the resultant value wasdetermined as the number average molecular weight of the cationicgroup-containing polyether polymer.

A molecular weight distribution of the cationic group-containingpolyether polymer was used as it is, assuming that the molecular weightdistribution was not changed from the molecular weight distribution ofthe polyether polymer not having a cationic group in which a cationicgroup has not yet been introduced.

(2) Structure of Polyether Polymer and Content Rate of Oxirane MonomerUnit Having Cationic Group

A structure of the polyether polymer and a content rate of an oxiranemonomer unit having a cationic group in a cationic group-containingpolyether polymer were measured as follows using a nuclear magneticresonator (NMR). That is, 30 mg of a sample polyether polymer was addedto 1.0 mL of deuterated chloroform or deuterated dimethylsulfoxide,which was shaken for 1 hour so that the sample polyether polymer wasdissolved uniformly. The resultant solution was then subjected to an NMRmeasurement to obtain ¹H-NMR spectrum, and a structure of the polyetherpolymer was determined in accordance with a usual method.

Further, the content rate of the oxirane monomer unit having a cationicgroup in the cationic group-containing polyether polymer was calculatedby the following method. That is, first of all, a mole number B1 of alloxirane monomer units was calculated from an integrated value of aproton derived from an oxirane monomer unit as a main chain. Next, amole number B2 of the oxirane monomer unit having a cationic group wascalculated from an integrated value of a proton derived from a cationicgroup. Then, a rate of B2 relative to B1 (percentage) was determined asthe content rate of the oxirane monomer unit having a cationic group inthe cationic group-containing polyether polymer.

(3) Heat Conductivity

Heat conductivity of each polymer composition 5 days after theproduction of the polymer composition was measured with a heatconductivity measurement device (“MentorGraphics DynTIM Tester”manufactured by Mentor Graphics Japan Co., Ltd.) using the followingmethod. That is, each sample polymer composition was famed into adisk-shaped test piece having a size of φ12.8 mm, which was hand-pressedto adjust a thickness so that the thickness of each sample was in arange from 0.1 mm to 1.0 mm to prepare a plurality of measurementsamples each having a different thickness. The prepared measurementsample was sandwiched between a heated portion and a measurement portionof the heat conductivity measurement device with a measurementtemperature difference between the heated portion and the measurementportion being 10° C., and heat resistance in a thickness direction wasmeasured in a measurement environment in which an atmosphere is 25° C.This heat resistance measurement was performed on the plurality ofmeasurement samples each having a different thickness, and the producedmeasurement results were then plotted using a linear approximateexpression to calculate the heat conductivity.

Further, the above heat conductivity measurement was also pertained onthe polymer compositions 5 days after the production of each polymercomposition as well as on the polymer compositions 2 months after theproduction. These measurement results were compared to check theirlong-term stability.

(4) Electrical Conductivity

Electrical conductivity of each polymer composition was measured usingpolymer compositions 5 days after the production of the polymercomposition with a low resistivity meter (“Loresta-GP” manufactured byMitsubishi Chemical Analytech Co., Ltd. A PSP probe was selected as a4-point probe.) using the following method in accordance with JIS K7194. First of all, 1.0 g of each sample polymer composition waspress-molded at a temperature ranging from 100° C. to 150° C. and apressure ranging from 0.1 to 1.0 MPa to form a thin film having athickness of 100 to 500 μm, which was subsequently cut into a squareshape of 10×10 mm to prepare a measurement sample. Next, the preparedmeasurement sample was secured to an insulating board of the lowresistivity meter, and the probe was pressed against the center of oneside (side A) of the measurement sample and then a voltage of 10 V wasapplied to measure a resistance value of the measurement sample. Basedon the resistance value obtained from the measurement, a size of ameasurement sample, and a measurement position, surface resistance(unit: Ω/□) was determined using an arithmetic equation that has beeninternally stored in the low resistivity meter. This measurement wasalso performed on the other side (side B) of the measurement sample inthe same manner as above to calculate an average value of the surfaceresistance measured with respect to the side A and side B, and thecalculated average value was determined as the surface resistance of themeasurement sample.

Further, the above measurement of the surface resistance was alsopertained on the polymer compositions that have been left for 2 monthsin addition to the polymer compositions that have been left for 5 dayssince the production of each polymer composition. These measurementresults were compared to check long-term stability.

(5) Dispersibility After Storing for a Long Time

A dispersed state-retaining property of each polymer composition wasmorphologically observed by a scanning electron microscope (SEM) toevaluate long-term stability. More specifically, with theabove-mentioned morphological observation, dispersibility after storingfor a long time was evaluated in accordance with the followingstandards. It can be determined that the more excellent thedispersibility after storing for a long time is, the more excellent thelong-term stability is.

Very good: The matrix polymer and the metal-containing powder as afiller retained a good dispersed state even 2 months after theproduction of the polymer composition.

Good: Although the matrix polymer and the metal-containing powder as afiller showed a good dispersed state for 1 week after the production ofthe polymer composition, the dispersed state was slightly deteriorated 2months after the production.

Poor: When a polymer composition was produced, the polymer compositionwas not capable of being famed into a grease form or a paste form andwas ended up in a powder form. Either that, or when a polymercomposition was produced, the polymer composition was capable of beingfamed into a grease form or a paste form, but agglomeration of themetal-containing powder as a filler was confirmed 5 days after theproduction.

Production Example 1

(Synthesis of Polyether Polymer A)

To a glass reactor vessel purged with argon and equipped with a stirrer,3.22 g of tetranormalbutylammonium bromide and 100 ml of toluene wereadded and then cooled to 0° C. Next, 1.370 g of triethylaluminum (1.2equivalents based on tetranormalbutylammonium bromide) dissolved in 10ml of normal hexane was added to allow a reaction to proceed for 15minutes to produce a catalyst composition. To the resultant catalystcomposition, 35.0 g of epichlorohydrin was added to carry out apolymerization reaction at 0° C. After the polymerization reaction wasinitiated, viscosity of the solution was gradually increased. After thereaction proceeded for 12 hours, a small amount of water was poured intothe polymerization reaction solution to stop the reaction. The resultantpolymerization reaction solution was washed with 0.1 N of a hydrochloricacid aqueous solution to remove a catalyst residue and was furtherwashed with ion-exchange water. After that, an organic phase was driedunder reduced pressure at 50° C. for 12 hours. As a result, an oil-likesubstance was produced in a yield of 34.6 g. According to GPC performedon the produced oil-like substance, a number average molecular weight(Mn) was 3,500, a molecular weight distribution (Mw/Mn) was 1.4, and thenumber of repeating units (the number of oxirane monomer units) was 37.Based on the above, the produced oil-like substance was identified aspolyether polymer A composed of an epichlorohydrin unit having abromomethyl group at a polymerization-initiating end and a hydroxy groupat a polymerization-terminating end.

Production Example 2

(Synthesis of Imidazolium Structure-Containing Polyether Polymer B)

5.0 g of polyether polymer A produced in Production Example 1, 6.1 g of1-methylimidazole, and 10.0 g of acetonitrile were added to a glassreactor vessel purged with argon and equipped with a stirrer, and thenheated to 80° C. After the reaction proceeded at 80° C. for 48 hours,the solution was cooled to a room temperature to stop the reaction. Theresultant mixture was washed with an equal weight mixed solution oftoluene/methanol/water, and then an organic phase containing1-methylimidazole and toluene was removed and an aqueous phase was driedunder reduced pressure at 50° C. for 12 hours, which eventually produced6.35 g of a light reddish solid. This solid was determined by a ¹H-NMRmeasurement and elemental analysis. As a result, the solid wasidentified as imidazolium structure-containing polyether polymer Bhaving a halide ion as a counter anion in which, in polyether polymer A(polyepichlorohydrin) that is a starting material, a part of a chlorogroup included in repeating units was substituted with a1-methylimidazolium group having a chloride ion as a counter anion and abromo group of a bromomethyl group at a polymerization-initiating endwas substituted with a 1-methylimidazolium group having a bromide ion asa counter anion. According to imidazolium structure-containing polyetherpolymer B, a number average molecular weight (Mn) was 4,300, a molecularweight distribution (Mw/Mn) was 1.4, and the number of repeating units(the number of oxirane monomer units) was 37. Further, a content rate ofthe oxirane monomer unit having a 1-methylimidazolium group as acationic group measured in accordance with the above method was 30 mol%.

Production Example 3

(Synthesis of Imidazolium Structure-Containing Polyether Polymer C)

5.0 g of polyether polymer A produced in Production Example 1, 12.1 g of1-methylimidazole, and 10.0 g of acetonitrile were added to a glassreactor vessel purged with argon and equipped with a stirrer, and heatedto 80° C. After the reaction proceeded at 80° C. for 48 hours, thesolution was cooled to a room temperature to stop the reaction. Theresultant mixture was washed with an equal weight mixed solution oftoluene/methanol/water, and then an organic phase containing1-methylimidazole and toluene was removed and an aqueous phase was driedunder reduced pressure at 50° C. for 12 hours, which eventually produced9.4 g of a light reddish solid. This solid was determined by a ¹H-NMRmeasurement and elemental analysis. As a result, the solid wasidentified as imidazolium structure-containing polyether polymer Chaving a halide ion as a counter anion in which, in polyether polymer A(polyepichlorohydrin) that is a starting material, all chloro groupsincluded in repeating units were substituted with a 1-methylimidazoliumgroup having a chloride ion as a counter anion and a bromo group of abromomethyl group at a polymerization-initiating end was substitutedwith a 1-methylimidazolium group having a bromide ion as a counteranion. According to imidazolium structure-containing polyether polymerC, a number average molecular weight (Mn) was 6,500, a molecular weightdistribution (Mw/Mn) was 1.4, and the number of repeating units (thenumber of oxirane monomer units) was 37. Further, a content rate of theoxirane monomer unit having a 1-methylimidazolium group as a cationicgroup measured in accordance with the above method was 100 mol %.

Production Example 4

(Synthesis of Imidazolium Structure-Containing Polyether Polymer D)

2.5 g of imidazolium structure-containing polyether compound C having ahalide ion as a counter anion produced in Production Example 3, 4.1 g oflithium bis(trifluoromethanesulfonyl)imide, and 20 mL of ion-exchangewater were added to a glass reactor vessel equipped with a stirrer.After the reaction proceeded at a room temperature for 30 minutes, thesolution was dried under reduced pressure at 50° C. for 12 hours. Theresultant solid-liquid mixture was washed with water to remove aninorganic salt, and then a liquid phase was extracted with toluene. Theresultant toluene solution was dried under reduced pressure at 50° C.for 12 hours, which eventually produced 5.7 g of a viscous liquid-formsubstance. The produced viscous liquid-form substance was determined bya ¹H-NMR spectrum measurement and elemental analysis. As a result, theviscous liquid-form substance was identified as imidazoliumstructure-containing polyether polymer D having abis(trifluoromethanesulfonyl)imide anion as a counter anion in which allchloride ions and bromide ions of imidazolium structure-containingpolyether compound having a halide ion as a counter anion that is astarting material were substituted with abis(trifluoromethanesulfonyl)imide anion. According to imidazoliumstructure-containing polyether polymer D, a number average molecularweight (Mn) was 15,500, a molecular weight distribution (Mw/Mn) was 1.4,and the number of repeating units (the number of oxirane monomer units)was 37. Further, a content rate of the oxirane monomer unit having a1-methylimidazolium group as a cationic group measured in accordancewith the above method was 100 mol %.

Production Example 5

(Synthesis of Imidazolium Structure-Containing Polyether Polymer E)

To a glass reactor vessel purged with argon and equipped with a stirrer,0.322 g of tetranormalbutylammonium bromide and 50 ml of toluene wereadded and cooled to 0° C. Next, 0.171 g of triethylaluminum (1.5equivalents based on tetranormalbutylammonium bromide) dissolved in 10ml of normal hexane was added to allow a reaction to proceed for 15minutes to produce a catalyst composition. To the resultant catalystcomposition, 17.0 g of epichlorohydrin was added to carry out apolymerization reaction at 0° C. After the polymerization reaction wasinitiated, viscosity of the solution was gradually increased. After thereaction proceeded for 12 hours, a small amount of water was poured intothe polymerization reaction solution to stop the reaction. The resultantpolymerization reaction solution was washed with 0.1 N of a hydrochloricacid aqueous solution to remove a catalyst residue and was furtherwashed with ion-exchange water. After that, an organic phase was driedunder reduced pressure at 50° C. for 12 hours. As a result, an oil-likesubstance was produced in a yield of 17.0 g. According to GPC performedon the produced oil-like substance, a number average molecular weight(Mn) was 17100, a molecular weight distribution (Mw/Mn) was 1.2, and thenumber of repeating units (the number of oxirane monomer units) was 185.Based on the above, the produced oil-like substance was identified aspolyether polymer E″ composed of an epichlorohydrin unit having abromomethyl group at a polymerization-initiating end and a hydroxy groupat a polymerization-terminating end.

Next, 5.0 g of polyether polymer E″ produced as above, 12.1 g of1-methylimidazole, and 10.0 g of acetonitrile were added to a glassreactor vessel purged with argon and equipped with a stirrer, and heatedto 80° C. After the reaction proceeded at 80° C. for 48 hours, thesolution was cooled to a room temperature to stop the reaction. Theresultant mixture was washed with an equal weight mixed solution oftoluene/methanol/water, and then an organic phase containing1-methylimidazole and toluene was removed and an aqueous phase was driedunder reduced pressure at 50° C. for 12 hours, which eventually produced9.4 g of a light reddish solid. This solid was determined by a ¹H-NMRmeasurement and elemental analysis. As a result, the solid wasidentified as imidazolium structure-containing polyether polymer E′having a halide ion as a counter anion in which, in polyether polymer E″that is a starting material, all chloro groups included in repeatingunits were substituted with a 1-methylimidazolium group having achloride ion as a counter anion and a bromo group of a bromomethyl groupat a polymerization-initiating end was substituted with a1-methylimidazolium group having a bromide ion as a counter anion.Further, a content rate of the oxirane monomer unit having a1-methylimidazolium group as a cationic group measured in accordancewith the above method was 100 mol %.

Then, 2.5 g of imidazolium structure-containing polyether polymer E′having a halide ion as a counter anion produced as above, 4.1 g oflithium bis(trifluoromethanesulfonyl)imide, and 20 mL of ion-exchangewater were added to a glass reactor vessel equipped with a stirrer.After the reaction proceeded at a room temperature for 30 minutes, thesolution was dried under reduced pressure at 50° C. for 12 hours. Theresultant solid-liquid mixture was washed with water to remove aninorganic salt, and then a liquid phase was extracted with toluene. Theresultant toluene solution was dried under reduced pressure at 50° C.for 12 hours, which eventually produced 5.7 g of a viscous liquid-fainsubstance. The produced viscous liquid-form substance was determined bya ¹H-NMR spectrum measurement and elemental analysis. As a result, theviscous liquid-fain substance was identified as imidazoliumstructure-containing polyether polymer E having abis(trifluoromethanesulfonyl)imide anion as a counter anion in which allchloride ions and bromide ions of imidazolium structure-containingpolyether polymer E′ having a halide ion as a counter anion that is astarting material were substituted with abis(trifluoromethanesulfonyl)imide anion. According to imidazoliumstructure-containing polyether polymer E, a number average molecularweight (Mn) was 78,000, a molecular weight distribution (Mw/Mn) was 1.2,and the number of repeating units (the number of oxirane monomer units)was 185. Further, a content rate of the oxirane monomer unit having a1-methylimidazolium group as a cationic group measured in accordancewith the above method was 100 mol %.

Production Example 6

(Synthesis of Imidazolium Structure-Containing Polyether Polymer F)

To a glass reactor vessel purged with argon and equipped with a stirrer,3.22 g of tetranormalbutylammonium bromide and 100 ml of toluene wereadded and then cooled to 0° C. Next, 1.370 g of triethylaluminum (1.2equivalents based on tetranormalbutylammonium bromide) dissolved in 10ml of normal hexane was added to allow a reaction to proceed for 15minutes to produce a catalyst composition. To the resultant catalystcomposition, 12.5 g of epichlorohydrin and 7.5 g of propylene oxide wereadded to carry out a polymerization reaction at 0° C. After thepolymerization reaction was initiated, viscosity of the solution wasgradually increased. After the reaction proceeded for 12 hours, a smallamount of water was poured into the polymerization reaction solution tostop the reaction. The resultant polymerization reaction solution waswashed with 0.1 N of a hydrochloric acid aqueous solution to remove acatalyst residue and was further washed with ion-exchange water. Afterthat, an organic phase was dried under reduced pressure at 50° C. for 12hours. As a result, an oil-like substance was produced in a yield of19.9 g. According to GPC performed on the produced oil-like substance, anumber average molecular weight (Mn) was 2030, a molecular weightdistribution (Mw/Mn) was 1.3, and the number of repeating units (thenumber of oxirane monomer units) was 27. Based on the above, theproduced oil-like substance was identified as polyether polymer F′composed of an epichlorohydrin unit and a propylene oxide unit that hasa bromomethyl group at a polymerization-initiating end and a hydroxygroup at a polymerization-terminating end. Further, a monomercomposition ratio of the epichlorohydrin monomer unit to the propyleneoxide monomer unit in polyether polymer F′ was 50 mol % to 50 mol %.

Next, 5.0 g of polyether polymer F′ produced as above, 12.1 g of1-methylimidazole, and 10.0 g of acetonitrile were added to a glassreactor vessel purged with argon and equipped with a stirrer, and heatedto 80° C. After the reaction proceeded at 80° C. for 48 hours, thesolution was cooled to a room temperature to stop the reaction. Theresultant mixture was washed with an equal weight mixed solution oftoluene/methanol/water, and then an organic phase containing1-methylimidazole and toluene was removed and an aqueous phase was driedunder reduced pressure at 50° C. for 12 hours, which eventually produced7.7 g of a light reddish solid. This solid was determined by a ¹H-NMRmeasurement and elemental analysis. As a result, the solid wasidentified as imidazolium structure-containing polyether polymer Fhaving a halide ion as a counter anion in which, in polyether polymer F′that is a starting material, all chloro groups included in repeatingunits were substituted with a 1-methylimidazolium group having achloride ion as a counter anion and a bromo group of a bromomethyl groupat a polymerization-initiating end was substituted with a1-methylimidazolium group having a bromide ion as a counter anion.According to imidazolium structure-containing polyether polymer F, anumber average molecular weight (Mn) was 6,500, a molecular weightdistribution (Mw/Mn) was 1.3, and the number of repeating units (thenumber of oxirane monomer units) was 27. Further, a content rate of theoxirane monomer unit having a 1-methylimidazolium group as a cationicgroup measured in accordance with the above method was 50 mol %.

Production Example 7

(Synthesis of Imidazolium Structure-Containing Polyether Polymer G)

To a glass reactor vessel purged with argon and equipped with a stirrer,0.32 g of tetranormalbutylammonium bromide and 50 ml of toluene wereadded and cooled to 0° C. Next, 0.171 g of triethylaluminum (1.5equivalents based on tetranormalbutylammonium bromide) dissolved in 10ml of normal hexane was added to allow a reaction to proceed for 15minutes to produce a catalyst composition. To the resultant catalystcomposition, 14.0 g of epichlorohydrin was added to carry out apolymerization reaction at 0° C. After the polymerization reaction wasinitiated, viscosity of the solution was gradually increased. After thereaction proceeded for 12 hours, a small amount of water was poured intothe polymerization reaction solution to stop the reaction. The resultantpolymerization reaction solution was washed with 0.1 N of a hydrochloricacid aqueous solution to remove a catalyst residue and was furtherwashed with ion-exchange water. After that, an organic phase was driedunder reduced pressure at 50° C. for 12 hours. As a result, an oil-likesubstance was produced in a yield of 13.8 g. According to GPC performedon the produced oil-like substance, a number average molecular weight(Mn) was 14000, a molecular weight distribution (Mw/Mn) was 1.2, and thenumber of repeating units (the number of oxirane monomer units) was 152.Based on the above, the produced oil-like substance was identified aspolyether polymer G′ composed of an epichlorohydrin unit having abromomethyl group at a polymerization-initiating end and a hydroxy groupat a polymerization-terminating end.

Next, 5.0 g of polyether polymer G′ produced as above, 12.1 g of1-methylimidazole, and 10.0 g of acetonitrile were added to a glassreactor vessel purged with argon and equipped with a stirrer, and heatedto 80° C. After the reaction proceeded at 80° C. for 48 hours, thesolution was cooled to a room temperature to stop the reaction. Theresultant mixture was washed with an equal weight mixed solution oftoluene/methanol/water, and then an organic phase containing1-methylimidazole and toluene was removed and an aqueous phase was driedunder reduced pressure at 50° C. for 12 hours, which eventually produced9.3 g of a light reddish solid. This solid was determined by a ¹H-NMRmeasurement and elemental analysis. As a result, the solid wasidentified as imidazolium structure-containing polyether polymer Ghaving a halide ion as a counter anion in which, in polyether polymer G′that is a starting material, all chloro groups included in repeatingunits were substituted with a 1-methylimidazolium group having achloride ion as a counter anion and a bromo group of a bromomethyl groupat a polymerization-initiating end was substituted with a1-methylimidazolium group having a bromide ion as a counter anion.According to imidazolium structure-containing polyether polymer G, anumber average molecular weight (Mn) was 26,700, a molecular weightdistribution (Mw/Mn) was 1.2, and the number of repeating units (thenumber of oxirane monomer units) was 152. Further, a content rate of theoxirane monomer unit having a 1-methylimidazolium group as a cationicgroup measured in accordance with the above method was 100 mol %.

Example 1

100 parts of polyether polymer A produced in Production Example 1, 407parts of a zinc oxide powder (manufactured by KANTO CHEMICAL CO., INC.,average particle size of 5 to 10 μm) and 207 parts of a silver powder(manufactured by Sigma-Aldrich, Co. LLC, average particle size of 5 to 8μm) as an inorganic filler, and 714 parts of N,N′-dimethylacetamide(DMAc) as a solvent were put into an automatic mortar and then mixed ata room temperature for 30 minutes. The resultant composition was furthermixed while heating and then further dried under conditions that theresultant composition was dried in a vacuum dryer of 0.01 MPa or less at60° C. for 12 hours or more, which produced a grease-form polymercomposition. Measurements and an evaluation of heat conductivity anddispersibility after storing for a long time were performed on theproduced grease-form heat dissipating polymer composition in accordancewith the above method. The results are shown in Table 1.

Example 2

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer B produced in Production Example2 was used instead of polyether polymer A produced in Example 1 and inaddition, 207 parts of a copper powder (manufactured by Sigma-Aldrich,Co. LLC, average particle size of 14 to 25 μm) was used instead of thesilver powder, and the measurements and the evaluation were performed inthe same manner as above. The results are shown in Table 1.

Example 3

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer C produced in Production Example3 was used instead of polyether polymer A produced in Production Example1, and the measurements and the evaluation were performed in the samemanner as above. The results are shown in Table 1.

Example 4

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer D produced in Production Example4 was used instead of polyether polymer A produced in Production Example1, and the measurements and the evaluation were pertained in the samemanner as above. The results are shown in Table 1.

Example 5

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer E produced in Production Example5 was used instead of polyether polymer A produced in Production Example1 and in addition, 207 parts of a copper powder (manufactured bySigma-Aldrich, Co. LLC, average particle size of 14 to 25 μm) was usedinstead of the silver powder, and the measurements and the evaluationwere performed in the same manner as above. The results are shown inTable 1.

Example 6

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer F produced in Production Example6 was used instead of polyether polymer A produced in Production Example1 and in addition, 207 parts of a copper powder (manufactured bySigma-Aldrich, Co. LLC, average particle size of 14 to 25 μm) was usedinstead of the silver powder, and the measurements and the evaluationwere performed in the same manner as above. The results are shown inTable 1.

Example 7

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer D produced in Production Example4 was used instead of polyether polymer A produced in Production Example1 and in addition, 210 parts of a boron nitride powder (manufactured byDenka Company Limited, average particle size of 10 to 18 μm) was usedinstead of the zinc oxide powder and the silver powder, and themeasurements and the evaluation were pertained in the same manner asabove. The results are shown in Table 1.

Example 8

A grease-form heat dissipating polymer composition was produced in thesame manner as in Example 1 except that 100 parts of imidazoliumstructure-containing polyether polymer E produced in Production Example5 was used instead of polyether polymer A produced in Production Example1 and in addition, 300 parts of a boron nitride powder (manufactured byDenka Company Limited, average particle size of 10 to 18 μm) was usedinstead of the zinc oxide powder and the silver powder, and themeasurements and the evaluation were performed in the same manner asabove. The results are shown in Table 1.

Comparative Example 1

A heat dissipating polymer composition was produced in the same manneras in Example 1 except that 100 parts of a liquid-form butadiene rubber(manufactured by Sigma-Aldrich, Co. LLC, number average molecularweight: 3,000, molecular weight distribution: 1.5) was used instead ofpolyether polymer A produced in Production Example 1 and in addition,714 parts of toluene was used as a solvent instead ofN,N′-dimethylacetamide (DMAc). Further, although the heat dissipatingpolymer composition produced in Comparative Example 1 was in a greaseform immediately after the production, the zinc oxide powder and thesilver powder were agglomerated as time went by and the compositionturned into a powder form after 5 days. Measurements and an evaluationwere performed on such a powder-form heat dissipating polymercomposition in accordance with the above method. In Comparative Example1, an attempt was made to measure heat conductivity of a disk-shapedtest piece that has been left for 2 months. However, keeping the shapeof the test piece was difficult, so that the test piece wasunmeasurable. The results are shown in Table 2.

Comparative Example 2

A heat dissipating polymer composition was produced in the same manneras in Comparative Example 1 except that 100 parts of a liquid-formsilicone rubber (manufactured by Gelest, Inc., number average molecularweight: 6,000, molecular weight distribution: 2.1) was used instead ofthe liquid-fain butadiene rubber. Since the heat dissipating polymercomposition produced in Comparative Example 2 was agglomerated in apowder form, it was not capable of being produced as a grease-formcomposition. The measurements and the evaluation were performed on theproduced powder-form heat dissipating polymer composition in accordancewith the above method. In Comparative Example 2, an attempt was made tomeasure heat conductivity of a disk-shaped test piece that has been leftfor 2 months. However, keeping the shape of the test piece wasdifficult, so that the test piece was unmeasurable. The results areshown in Table 2.

Comparative Example 3

A heat dissipating polymer composition was produced in the same manneras in Comparative Example 1 except that 100 parts of ahigh-molecular-weight styrene-butadiene rubber (number average molecularweight: 250,000, molecular weight distribution: 2.6) was used instead ofthe liquid-form butadiene rubber and in addition, 207 parts of thecopper powder (manufactured by Sigma-Aldrich, Co. LLC, average particlesize of 14 to 25 μm) was used instead of the silver powder. Since theheat dissipating polymer composition produced in Comparative Example 3was agglomerated in a powder form, it was not capable of being producedas a grease-form composition. The measurements and the evaluation wereperformed on the produced powder-form heat dissipating polymercomposition in accordance with the above method. In Comparative Example3, an attempt was made to measure heat conductivity of a disk-shapedtest piece that has been left for 2 months. However, keeping the shapeof the test piece was difficult, so that the test piece wasunmeasurable. The results are shown in Table 2.

Comparative Example 4

A heat dissipating polymer composition was produced in the same manneras in Comparative Example 1 except that 100 parts of ahigh-molecular-weight silicone rubber (number average molecular weight:63,000, molecular weight distribution: 2.3) was used instead of theliquid-fain butadiene rubber and in addition, 207 parts of the copperpowder (manufactured by Sigma-Aldrich, Co. LLC, average particle size of14 to 25 μm) was used instead of the silver powder. Since the heatdissipating polymer composition produced in Comparative Example 4 wasagglomerated in a powder form, it was not capable of being produced as agrease-form composition. The measurements and the evaluation wereperformed on the produced powder-form heat dissipating polymercomposition in accordance with the above method. In Comparative Example4, an attempt was made to measure heat conductivity of disk-shaped testpieces that each have been left for 5 days and 2 months since theproduction. However, keeping the shape of the test pieces was difficult,so that the test pieces were unmeasurable. The results are shown inTable 2.

TABLE 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6Example 7 Example 8 Kind of polymer Polyether Imidazolium ImidazoliumImidazolium Imidazolium Imidazolium Imidazole Imidazole polymer Astructure- structure- structure- structure- structure- structure-structure- containing containing containing containing containingcontaining containing polyether polyether polyether polyether polyetherpolyether polyether polymer B polymer C polymer D polymer E polymer Fpolymer D polymer E Number of oxirane monomer units 37 37 37 37 185 2737 185 Mn of polymer 3,500 4,300 6,500 15,500 78,000 6,500 15,500 78,000Mw/Mn of polymer 1.4 1.4 1.4 1.4 1.2 1.3 1.4 1.2 Content ratio ofoxirane (mol %) — 30 100 100 100 50 100 100 monomer unit having cationicgroup Composition Polymer (part(s)) 100 100 100 100 100 100 100 100 Zinc(part(s)) 407 407 407 407 407 407 — — oxide powder Copper (part(s)) — —— — 207 207 — — powder Silver (part(s)) 207 — 207 207 — — — — powderBoron (part(s)) — — — — — — 210 300 nitride powder Initial form ofsample Grease Grease Grease Grease Grease Grease Grease Grease form formform form form form form form Heat conductivity after 5 (W/(m · K)) 1.951.87 1.53 2.56 2.38 2.11 3.00 3.92 days Heat conductivity after 2 (W/(m· K)) 1.06 1.85 1.54 2.56 2.34 2.10 2.99 3.93 months Dispersibilityafter storing for a long time Good Very Very Very Very Very Very VeryGood Good Good Good Good Good Good

TABLE 2 Comparative Comparative Comparative Comparative Example 1Example 2 Example 3 Example 4 Kind of polymer Liquid-form Liquid-formStyrene- Silicone rubber butadiene silicone rubber butadiene rubberrubber Number of oxirane monomer units — — — — Mn of polymer 3,000 6,000250,000 63,000 Mw/Mn of polymer 1.5 2.2 2.1 2.3 Content ratio of oxiranemonomer unit (mol %) — — — — having cationic group Composition Polymer(part(s)) 100 100 100 100 Zinc oxide powder (part(s)) 407 407 407 407Copper powder (part(s)) — — 207 207 Silver powder (part(s)) 207 207 — —Initial form of sample Grease form to Powder form Powder form Powderform powder form Heat conductivity after 5 days (W/(m · K)) 0.3 0.2 orless 0.2 or less Unmeasurable Surface resistance after 2 months (W/(m ·K)) Unmeasurable Unmeasurable Unmeasurable Unmeasurable Dispersibilityafter storing for a long time Poor Poor Poor Poor

Evaluation of Heat Dissipating Polymer Composition (Examples 1 to 8,Comparative Examples 1 to 4)

As shown in Table 1 and Table 2, a polyether polymer compositioncontaining 50 parts or more of a metal-containing powder as a filler per100 parts of a polyether polymer composed of 10 to 200 oxirane monomerunits was capable of being produced as a grease-form composition andalso had high heat conductivity after 5 days from the production whichwas excellent heat conductivity. Further, the heat conductivity wassuitably maintained even after 2 months and in addition, dispersibilityafter storing for a long time was also good which was excellentstability in storing for a long time. For that reason, the polyetherpolymer composition was capable of being suitably used as a heatdissipating grease (Examples 1 to 8).

On the other hand, when a liquid-form butadiene rubber, a liquid-fainsilicone rubber, a styrene-butadiene rubber, and a silicone rubber wereeach used instead of the polyether polymer composed of 10 to 200 oxiranemonomer units, dispersibility of each polymer and the metal-containingpowder as a filler was poor and none of them were capable of beingproduced as a grease-form composition or the composition tamed into apowder form as time went by even though the grease-form composition wasproduced. Further, the heat conductivity and the stability in storingfor a long time were also poor (Comparative Examples 1 to 4).

Example 9

100 parts of polyether polymer A produced in Production Example 1, 233parts of the silver powder (manufactured by Sigma-Aldrich, Co. LLC,average particle size of 5 to 8 μm) as an inorganic filler, and 333parts of N,N′-dimethylacetamide (DMAc) as a solvent were put into anautomatic mortar and then mixed at a room temperature for 30 minutes.The resultant composition was further mixed while heating, and thenfurther dried under conditions that the resultant composition was driedin a vacuum dryer of 0.01 MPa or less at 60° C. for 12 hours or more,which produced a paste-form polymer composition. Measurements and anevaluation of surface resistance (electrical conductivity) anddispersibility after storing for a long time were performed on theproduced paste-form electrically conductive polymer composition inaccordance with the above method. The results are shown in Table 3.

Example 10

A paste-form electrically conductive polymer composition was produced inthe same manner as in Example 9 except that 100 parts of imidazoliumstructure-containing polyether polymer B produced in Production Example2 was used instead of polyether polymer A produced in Production Example1, and the measurements and the evaluation were performed in the samemanner as above. The results are shown in Table 3.

Example 11

A paste-form electrically conductive polymer composition was produced inthe same manner as in Example 10 except that an amount used of thesilver powder was changed from 233 parts to 400 parts, and themeasurements and the evaluation were performed in the same manner asabove. The results are shown in Table 3.

Example 12

A paste-form electrically conductive polymer composition was produced inthe same manner as in Example 9 except that 100 parts of imidazoliumstructure-containing polyether polymer G produced in Production Example7 was used instead of polyether polymer A produced in Production Example1 and in addition, an amount used of the silver powder was changed from233 parts to 900 parts, and the measurements and the evaluation wereperformed in the same manner as above. The results are shown in Table 3.

Example 13

A paste-form electrically conductive polymer composition was produced inthe same manner as in Example 9 except that 100 parts of imidazoliumstructure-containing polyether polymer D produced in Production Example4 was used instead of polyether polymer A produced in Production Example1, and the measurements and the evaluation were performed in the samemanner as above. The results are shown in Table 3.

Comparative Example 5

An electrically conductive polymer composition was produced in the samemanner as in Example 9 except that 100 parts of a liquid-form butadienerubber (manufactured by Sigma-Aldrich, Co. LLC, number average molecularweight: 3,000, molecular weight distribution: 1.5) was used instead ofpolyether polymer A produced in Production Example 1 and in addition,333 parts of toluene was used as a solvent instead ofN,N′-dimethylacetamide (DMAc). Although the electrically conductivepolymer composition produced in Comparative Example 5 was a paste formimmediately after the production, the silver powder was agglomerated astime went by and the composition turned into a powder form after 5 days.Measurements and an evaluation were pertained on such a powder-formelectrically conductive polymer composition in accordance with the abovemethod. In Comparative Example 5, an attempt was made to measure surfaceresistance (electrical conductivity) of a test piece that has been leftfor 2 months. However, keeping the shape of the test piece wasdifficult, so that the test piece was unmeasurable. The results areshown in Table 4.

Comparative Example 6

An electrically conductive polymer composition was produced in the samemanner as in Comparative Example 5 except that 100 parts of aliquid-form silicone rubber (manufactured by Gelest, Inc., numberaverage molecular weight: 6,000, molecular weight distribution: 2.1) wasused instead of the liquid-form butadiene rubber. Since the electricallyconductive polymer composition produced in Comparative Example 6 wasagglomerated in a powder form, it was not capable of being produced as apaste-form composition. The measurements and the evaluation wereperformed on the produced powder-form electrically conductive polymercomposition in accordance with the above method. In Comparative Example6, an attempt was made to measure surface resistance (electricalconductivity) of test pieces that each have been left for 5 days and 2months from the production. However, keeping the shape of the testpieces was difficult, so that the test pieces were unmeasurable. Theresults are shown in Table 4.

Comparative Example 7

An electrically conductive polymer composition was produced in the samemanner as in Comparative Example 5 except that 100 parts of ahigh-molecular-weight styrene-butadiene rubber (number average molecularweight: 250,000, molecular weight distribution: 2.6) was used instead ofthe liquid-form butadiene rubber. Since the electrically conductivepolymer composition produced in Comparative Example 7 was agglomeratedin a powder form, it was not capable of being produced as a paste-formcomposition. The measurements and the evaluation were performed on theproduced powder-form electrically conductive polymer composition inaccordance with the above method. In Comparative Example 7, an attemptwas made to measure surface resistance (electrical conductivity) of testpieces that each have been left for 5 days and 2 months from theproduction. However, keeping the shape of the test pieces was difficult,so that the test pieces were unmeasurable. The results are shown inTable 4.

Comparative Example 8

An electrically conductive polymer composition was produced in the samemanner as in Comparative Example 5 except that 100 parts of ahigh-molecular-weight silicone rubber (number average molecular weight:63,000, molecular weight distribution: 2.3) was used instead of theliquid-form butadiene rubber. Since the electrically conductive polymercomposition produced in Comparative Example 8 was agglomerated in apowder form, it was not capable of being produced as a paste-formcomposition. The measurements and the evaluation were performed on theproduced powder-form electrically conductive polymer composition inaccordance with the above method. In Comparative Example 8, an attemptwas made to measure surface resistance (electrical conductivity) of testpieces that each have been left for 5 days and 2 months from theproduction. However, keeping the shape of the test pieces was difficult,so that the test pieces were unmeasurable. The results are shown inTable 4.

TABLE 3 Example 9 Example 10 Example 11 Example 12 Example 13 Kind ofpolymer Polyether Imidazolium Imidazolium Imidazolium Imidazoliumpolymer A structure- structure- structure- structure- containingcontaining containing containing polyether polyether polyether polyetherpolymer B polymer B polymer G polymer D Number of oxirane monomer units37 37 37 152 37 Mn of polymer 3,500 4,300 4,300 26,700 15,500 Mw/Mn ofpolymer 1.4 1.4 1.4 1.2 1.2 Content ratio of oxirane monomer unit havingcationic group (mol %) — 30 30 30 100 Composition Polymer (part(s)) 100100 100 100 100 Zinc oxide powder (part(s)) — — — — — Copper powder(part(s)) — — — — — Silver powder (part(s)) 233 233 400 900 233 Initialform of sample Paste form Paste form Paste form Paste form Paste formSurface resistance after 5 days (Ω/□) 2.3 × 10⁰ 8.2 × 10⁻¹ 5.2 × 10⁻³6.9 × 10⁻⁴ 1.6 × 10¹ Surface resistance after 2 months (Ω/□) 7.2 × 10²8.5 × 10⁻¹ 4.7 × 10⁻³ 6.4 × 10⁻⁴ 2.0 × 10¹ Dispersibility after storingfor a long time Good Very Good Very Good Very Good Very Good

TABLE 4 Comparative Comparative Comparative Comparative Example 5Example 6 Example 7 Example 8 Kind of polymer Liquid-form Liquid-formStyrene- Silicone rubber butadiene silicone rubber butadiene rubberrubber Number of oxirane monomer units — — — — Mn of polymer 3,000 6,000250,000 63,000 Mw/Mn of polymer 1.5 2.2 2.1 2.3 Content ratio of oxiranemonomer unit (mol %) — — — — having cationic group Composition Polymer(part(s)) 100 100 100 100 Zinc oxide powder (part(s)) — — — — Copperpowder (part(s)) — — — — Silver powder (part(s)) 233 233 233 233 Initialform of sample Paste form to Powder form Powder form Powder form powderform Surface resistance after 5 days (Ω/□) 10⁸ or more UnmeasurableUnmeasurable Unmeasurable Surface resistance after 2 months (Ω/□)Unmeasurable Unmeasurable Unmeasurable Unmeasurable Dispersibility afterstoring for a long time Poor Poor Poor Poor

Evaluation of Electrically Conductive Polymer Composition (Examples 9 to13, Comparative Examples 5 to 8)

As shown in Tables 3 and 4, a polyether polymer composition containing50 parts or more of a metal-containing powder as a filler per 100 partsof a polyether polymer composed of 10 to 200 oxirane monomer units wascapable of being produced as a paste form composition and also had lowsurface resistance 5 days after the production which was excellentelectrical conductivity. Further, the low surface resistance wassuitably maintained even after 2 months and in addition, dispersibilityafter storing for a long time was also good which was excellentstability in storing for a long time. For that reason, the polyetherpolymer composition was capable of being suitably used as anelectrically conductive paste (Examples 9 to 13).

On the other hand, when a liquid-form butadiene rubber, a liquid-formsilicone rubber, a styrene-butadiene rubber, and a silicone rubber wereeach used instead of the polyether polymer composed of 10 to 200 oxiranemonomer units, dispersibility of each polymer and the metal-containingpowder as a filler was poor. Further, the electrical conductivity andthe stability in storing for a long time were also poor (ComparativeExamples 5 to 8).

The invention claimed is:
 1. A polyether polymer composition comprising50 parts by weight or more of a filler per 100 parts by weight of apolyether polymer composed of 10 to 200 oxirane monomer units.
 2. Thepolyether polymer composition according to claim 1, wherein the filleris a metal-containing powder.
 3. The polyether polymer compositionaccording to claim 2, wherein the metal-containing powder is at leastone selected from a metal powder, a metal oxide powder, and a metalnitride powder.
 4. The polyether polymer composition according to claim1, wherein at least a part of the oxirane monomer unit composing thepolyether polymer is an oxirane monomer unit having a cationic group. 5.The polyether polymer composition according to claim 4, wherein thepolyether polymer comprises a monomer unit represented by the followinggeneral formula (1):

wherein A⁺ represents a cationic group or a cationic group-containinggroup, X⁻ represents any counter anion, R represents a non-ionic group,n is an integer of 1 or more, m is an integer of 0 or more, and n+msatisfies 10≤n+m≤200.
 6. The polyether polymer composition according toclaim 4, wherein the cationic group comprises a heterocyclic ring havinga cationic nitrogen atom.
 7. The polyether polymer composition accordingto claim 1, wherein an average particle size of the filler is 0.01 μm ormore and less than 50 μm.
 8. The polyether polymer composition accordingto claim 1 being a heat dissipating polymer composition.
 9. Thepolyether polymer composition according to claim 1 being an electricallyconductive polymer composition.
 10. The polyether polymer compositionaccording to claim 1 being in a grease form or a paste form.